Oh, he addresses the letter to you, Dad.
4 seconds sound clip from the King Boxer: Fingers of Death movie soundboard.
You can hear this line at 00:37:48 in the Blu-ray version of the movie.
Quote context
[...]
- Let's have a little match so you can show me.
- You know I'm no match for you. Let's forget the idea.
- Dad, there's a letter from Chih-Hao.
- Oh, he addresses the letter to you, Dad.
- My dear sir, I'm truly grateful for all you've done for me. You've been so kind.
- I should've stayed at home to help you like a dutiful son.
- I was sad to say goodbye, and I'm thinking of you and Ying Ying every moment of the day.
- As Suen Hsin-Pei's pupil, I have to work hard.
- And it's thanks to your training, that I can keep up.
[...]